A mixture of 8.1 g CH4 and 8.1 g Kr is placed in a container and the total pressure is found to be 0.38 atm . 1) Find the partial pressure of CH4. 2) What is the oxidation number change for the oxygen atom in the following unbalanced reduction reaction : C8H8(g) + O2 (g) → CO2(g) + H2O(g)

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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